farrier: A person specially trained to care for and treat horses' hooves.
filly: A 4-year-old or younger female horse.
flehmen response: The curling of the upper lip.
foal: Any male or female horse that is less than 12 months of age.
feathers: Flowing hair on the fetlocks of a horse.
fetlock: Portion of a horse's lower leg that lies above the pastern.
forehand: A section of the horse's anatomy going forward from the heart girth.
forelock: The growth of hair that lies on the forehead and between the ears.
frog: A shock-absorbing pad on a horse's hoof.
hackamore: A bit-less bridle.
gaited horse: Breeds, such as the Tennessee Walking Horse, that have a highly distinctive gait.
gall: A swollen spot or a sore.
gallop: A full-speed gait.
gelding: A castrated male horse.
hackamore: A bridle without a bit.
hand: Equal to four inches, this unit of measurement is taken at the highest part of the withers on a horse.
headstall: Also known as a bridle.
heart girth: A measurement of a horse just behind its front legs around the barrel.
herd-bound: A negative behavior in which the horse wants to bolt for the stables or join other horses. Also called "barn sour."
hunter: any breed of horse that is trained to hunt.
inside: In a show room or any enclosed space, such as a pen, the side of the horse that faces the center.
irons: On an English saddle, these are the stirrups.